Apparatus and methods for phototherapy

ABSTRACT

There is provided a phototherapy apparatus, in which the therapeutic light is delivered through or in proximity to one or more massage components. The massage component provides mechanical massage to the subject biological tissue and modifies the properties of the subject tissue in thickness, density, etc. to facilitate the absorption of the therapeutic light and enhance the effect of the phototherapy procedure.

REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No. 12/104,012 filed Apr. 16, 2008, now issued as U.S. Pat. No. 8,968,221. Issued U.S. Pat. No. 8,968,221, in turn, claims priority to U.S. Provisional Patent Application Nos. 60/912,284 filed Apr. 17, 2007; 60/976,554 filed Oct. 1, 2007; and 60/983,719 filed Oct. 30, 2007, the entire disclosures of which are hereby incorporated herein by reference.

FIELD OF THE INVENTION

This invention relates to apparatus and methods for phototherapy.

BACKGROUND

Phototherapy relates to treatment of biological tissues, such as skin tissues, using visible, ultraviolet, and/or infrared lights. The light treatment may be applied solely for sterilization, pain relief, bio-modulation, and photo-rejuvenation. Alternatively, the treatment may be used in combination with certain photo-sensitive drugs or nutrition supplements. In comparison with laser surgery, the light intensity employed in phototherapy is much lower. Thus the light sources used in phototherapy are not limited to lasers but may include light emitting diodes (LEDs) and/or certain types of lamps as well. Typical applications of phototherapy include wound healing, cellulite reduction, skin rejuvenation, pain relief, fat reduction and contouring, laser acupuncture, pressure ulcer treatment, etc.

It is well known in the prior art that phototherapy may be applied in combination with other treatment methods such as local heating/cooling, magnetic therapy, mechanical massage involving rolling, kneading, vibrating components, etc. Some examples can be found in U.S. Pat. No. 7,033,382 to Lach; and U.S. Patent Application Nos. 20060253051 to Milne et al, 20060235494, 20040236252 to Muzzi et al, and 20070073366 to Porco. However, none of the prior art disclosure suggests to apply phototherapy with other treatment methods in a concerted manner, where phototherapy and some or all of the other treatment methods are applied to the same target area and benefit from each other thereby producing significantly improved therapeutic results.

SUMMARY OF THE INVENTION

There is provided a phototherapy apparatus, wherein the therapeutic light is delivered through or in proximity to one or more massage components. The massage component provides mechanical massage to a subject biological tissue and modifies the properties of the subject tissue in thickness, density, local pressure, micro-circulation, etc. to facilitate the absorption and interaction of the therapeutic light with the subject tissue and enhance the effect of the phototherapy procedure. Meanwhile, the therapeutic light in its interaction with the illuminated tissue also facilitates and enhances the effect of the mechanical massage.

A phototherapy apparatus for treatment of a biological tissue is provided. The phototherapy apparatus comprising: at least one light source to provide therapeutic light to be absorbed by the biological tissue to produce a first therapeutic effect; and at least one massage component to provide mechanical massage to the biological tissue to produce a second therapeutic effect. The therapeutic light and mechanical massage are applied to the biological tissue in a concerted manner. The mechanical massage modifies a plurality of properties or conditions of the biological tissue to facilitate absorption or interaction of the therapeutic light with the biological tissue to improve the first therapeutic effect. The therapeutic light modifies a plurality of properties or conditions of the biological tissue to improve the second therapeutic effect.

A method for making a phototherapy apparatus for treatment of a biological tissue is provided. The method comprising the steps of: providing at least one light source to provide therapeutic light to be absorbed by the biological tissue to produce a first therapeutic effect; and providing at least one massage component to provide mechanical massage to the biological tissue to produce a second therapeutic effect. The therapeutic light and mechanical massage are applied to the biological tissue in a concerted manner. The mechanical massage modifies a plurality of properties or conditions of the biological tissue to facilitate absorption or interaction of the therapeutic light with the biological tissue to improve the first therapeutic effect. The therapeutic light modifies a plurality of properties or conditions of the biological tissue to improve the second therapeutic effect.

A method for treatment of biological tissue with phototherapy is provided. The method comprising the steps of: providing at least one light source to provide therapeutic light to be absorbed by the biological tissue to produce a first therapeutic effect; and providing at least one massage component to provide mechanical massage to the biological tissue to produce a second therapeutic effect. The therapeutic light and mechanical massage are applied to the biological tissue in a concerted manner. The mechanical massage modifies a plurality of properties or conditions of the biological tissue to facilitate absorption or interaction of the therapeutic light with the biological tissue to improve the first therapeutic effect. The therapeutic light modifies a plurality of properties or conditions of the biological tissue to improve the second therapeutic effect.

BRIEF DESCRIPTION OF THE FIGURES

The accompanying figures, where like reference numerals refer to identical or functionally similar elements throughout the separate views and which together with the detailed description below are incorporated in and form part of the specification, serve to further illustrate various embodiments and to explain various principles and advantages all in accordance with the present invention.

FIG. 1a ′ illustrates an interior view of the phototherapy apparatus of FIG. 1 a.

FIG. 1a illustrates one exemplified embodiment of the phototherapy apparatus, in which the therapeutic light is delivered through a transparent massage ball.

FIG. 1b illustrates the operation procedure of the phototherapy apparatus of FIG. 1 a.

FIG. 2 illustrates a slight variation of the phototherapy apparatus of FIG. 1, in which liquid or air can be delivered around the massage ball through an array of holes.

FIG. 3 illustrates a second exemplified embodiment of the phototherapy apparatus, in which the therapeutic light is delivered from inside of a transparent massage roller.

FIG. 4 illustrates a slight variation of the phototherapy apparatus of FIG. 3, in which the massage roller is made of non-transparent material comprising a matrix of holes.

FIG. 5 illustrates a third exemplified embodiment of the phototherapy apparatus, in which the therapeutic light is delivered in proximity to a massage component.

FIG. 6 illustrates a fourth exemplified embodiment of the phototherapy apparatus, in which the therapeutic light is delivered in proximity to two massage rollers rolling in opposite directions.

FIGS. 7a and 7b illustrate another variation of the phototherapy apparatus of FIG. 2, in which the massage ball has a diffusive or scattering optical surface.

Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.

DETAILED DESCRIPTION

Before describing in detail embodiments that are in accordance with the present invention, it should be observed that the embodiments reside primarily in combinations of method steps and apparatus components related to phototherapy. Accordingly, the apparatus components and method steps have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

In this document, relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by “comprises . . . a” does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

In the first embodiment of the present invention as shown in FIG. 1a and FIG. 1a ′, the phototherapy apparatus 100 comprises a rolling massage ball 102 coupled to a top of a hand piece 104. The massage ball 102 can rotate freely in all directions (a 360° freedom of movement) in a chamber 105 of the hand piece 104 with controlled friction. The therapeutic light emitted from a laser or a light emitting diode (LED) (both not shown) is first coupled into or carried by an optical fiber 106 and then delivered onto the massage ball 102 through a beam expander 108 wherein the therapeutic light beam is expended therefore. The massage ball 102 is transparent at the wavelength of the therapeutic light. Thus the subject therapeutic light will transmit through the massage ball 102 to the biological tissue for treatment purposes. In a slight variation of the embodiment, the therapeutic light can be delivered onto the massage ball via free space optics or other types of light guides all of which are contemplated by the present invention.

Referring now to FIG. 1b , the phototherapy apparatus 100 is utilized to treat a skin tissue 112, where the therapeutic light 110 is delivered through the transparent massage ball 102. When a force is applied onto the hand piece (not shown), the massage ball 102 will roll on the skin tissue 112 and deliver a pressure on the skin tissue in contact with the massage ball 102. On one hand, this rolling and kneading action causes an increase in blood circulation and fluid mobilization of the subcutaneous tissue, smoothes and firms the subject anatomy. Thus lipolysis is restored and fat cell metabolism is reactivated, resulting in the reduction of fat tissue and smoothing of cellulite. It also can help for the relief of muscle aches and pain. On the other hand, the action also causes a reduction in skin thickness and an increase in skin density. This change in skin tissue property helps to reduce the overall absorption and scattering loss of the therapeutic light 110 and allows the therapeutic light 110 to penetrate deeper under the skin and induce stronger photochemical processes, e.g. increase of ATP (adenosine triphosphate), triggering of photo neurological response and activation of enzymes, changes in local pressure, increases in temperature and permeability of cellular membranes. Since the massage ball 102 is in contact with the skin tissue 112, the therapeutic light 110 will penetrate into the skin tissue 112 directly with no air interface. This feature allows the practitioner to control the intensity of the delivered therapeutic light in a more accurate manner. The photo bio-modulation in turn helps to enhance the effect of the mechanical massage by stimulating inter or intra cellular response, increasing micro-circulation, etc.

In a slight variation of the present embodiment as shown in FIG. 2, the ball chamber 105 of the hand piece 104 comprises an array of holes 114 formed adjacent to the massage ball 102. Through these holes, cooling/warming air/liquid, or massage oil/lubricant with specific therapeutical effects may be delivered to the skin tissue during the treatment process. The cooling/warming air/liquid may be used for thermal therapy, while the massage oil/lubricant may help to soften/soothe the skin tissue and maintain its moisture level. The combined mechanical massage and photo bio-stimulation can enhance the response of the skin tissue to the massage oil/lubricant and allow same to penetrate deeper so as to be absorbed by inner skin tissues. The effect of such enhancements include, but are not limited to, increased micro-circulation, elevated temperature, and stimulated inter or intra cellular response. As another possibility, a gap can be introduced between the massage ball 102 and the chamber 105 for delivering cooling/warming air/liquid, or massage oil/lubricant to the subject tissue. The cooling/warming air/liquid, or massage oil/lubricant can be injected into the chamber 105 through a tube 116 connected to the hand piece 104.

In another variation of the present embodiment as shown in FIG. 7a and FIG. 7b , the massage ball 102 may have a diffusive or scattering optical surface, which is capable of spreading the transmitted light into various angles and directions. The diffusive surface can be prepared by forming some type of micro-structures on the surface of the massage ball, or by coating a layer of diffusive optical material on the massage ball. Referring to FIG. 7a , when the massage ball 102 is not in contact with the skin tissue 112, the therapeutic light 110 is diffused by the diffusive surface as it transmits through the massage ball into air. Thus the transmitted light 114 has an increased spread angle and hence a reduced light intensity when viewed from a distance away. This reduction in viewed light intensity enhances the safety level of the phototherapy apparatus. In comparison, when the massage ball 102 is in contact with the skin tissue 112 as shown in FIG. 7b , the transmitted light 114 is much less distorted or spread. This is due to the fact that the skin in contact with the surface of the massage ball serves as an optical index matching medium which effectively reduces diffusing or scattering cause by the massage ball surface. Hence, the light beam is effectively delivered into the tissue with desired direction, angle, power density, depth, and intensity distribution. As another variation, certain optical index matching liquids, gels, suspension particles, powders may be applied between the massage ball 102 and the skin tissue 112 to further enhance light transmittance and reduce the light distortion caused by the massage ball surface. Those optical index matching media may also have therapeutic or pharmaceutical effect to further improve the effect of phototherapy.

In yet another variation of the present embodiment, the massage ball (or simply an optical window with curved surface) 102 is rigidly affixed to the chamber 105 and moves together or in unison with the hand piece 104. In this variation, the mechanical massage is performed by kneading the subject tissue 112 with the massage ball 102 without the rolling action.

In yet another variation of the present embodiment, a motor is installed in the hand piece 104 and mechanically coupled to massage ball 102 to generate rolling, kneading, and/or vibration movements of the massage ball 102.

One application of the phototherapy apparatus 100 is relieving the pain associated with migraine headaches, in which therapeutic light is delivered through the transparent massage ball to the forehead, temples, paranasal sinus, and/or neck of the patient. The optical properties of the massage ball, such as its refractive index, diameter or curvature, etc. can be utilized to shape the light beam to an ideal spot size or value. The phototherapy apparatus 100 may further comprise a touch sensor (not shown) or a pressure sensor (also not shown), such as a spring loaded device feature to control the on/off status of the light source in such a way that the light source can only be turned on when the massage ball touches the skin tissue. This helps to improve the safety of laser treatments around the eye by limiting the chance of laser exposure to the eye directly. Other applications of the phototherapy apparatus 100 comprise cellulite reduction, skin rejuvenation, pain relief, fat reduction and/or contouring, laser acupuncture, wound healing, and/or pressure ulcer treatment.

As can be seen, a variety of embodiments are possible within the scope of the present invention.

Referring to FIG. 3, the second embodiment of the phototherapy apparatus comprises a hollow massage roller 302 with an array of therapeutic laser diodes or LEDs 304 mounted along an inner axis 308 within the roller 302. Each of the laser diodes or LEDs 304 is designed to emit therapeutic light 306 with a predetermined divergence angle (8) as shown in the figure. The roller 302 is made of material transparent to the wavelength of the therapeutic light 306. Correspondingly, when the roller 302 is applied to roll across a subject tissue surface to provide mechanical massage, the therapeutic light 306 simultaneously induce photo bio-modulation in the massaged tissue to produce enhanced phototherapy results.

In a slight variation of the present embodiment as shown in FIG. 4, the phototherapy apparatus comprises a hollow massage roller 402 made of material not transparent at the wavelength of the therapeutic light 406, where the therapeutic light 406 is produced by an array of therapeutic laser diodes or LEDs 404 mounted along the inner axis 408 of the massage roller 402. The massage roller 402 comprises a matrix of holes 410 which can let the therapeutic light 406 pass through to produce a patterned illumination onto the surface of the subject tissue. This kind of spatially modulated illumination pattern can further enhance the photo bio-modulation effect. In this embodiment, a positive or negative air pressure from a pressure source (not shown) may be applied through the matrix of holes as an added way to manipulate the treatment area. Either cooled or warm/hot air can be blown through the holes for decreasing or increasing the temperature of the skin. Alternatively, the massage roller 402 can be made of material transparent to the wavelength of the therapeutic light 406 except part of the roller surface is covered by patches of non-transparent materials to produce a patterned illumination.

In the third embodiment of the present invention as shown in FIG. 5, the therapeutic light sources 504 are mounted on a fixture 508 mechanically coupled to a massage component 502. The therapeutic light 506 produced by the light source 504 is delivered to the subject tissue 512 along a path proximal to the massage component 502. As the massage component 502 rolls across the tissue 512, the therapeutic light 506 induces photochemical reaction in the massaged tissue 512 before the tissue restores to its original state. Thus similar enhancement in phototherapy result is produced. In this embodiment, the massage component 502 needs not to be transparent to the therapeutic light 506.

Referring to FIG. 6, the fourth embodiment of the phototherapy apparatus comprises two massage rollers 602 rolling in opposite directions, or with different rolling speeds or different surface frictions. Those rolling movements cause a portion of the tissue 612 between the two rollers 602 to be squeezed and therefore increasing in height. By illuminating the raised tissue with the therapeutic light 606, either through, or in proximity to the two rollers 602, the inner layer of the tissue, which is hard to reach when illuminated from top of the tissue, can be treated with the phototherapy procedure. The height of the raised tissue can be further increased by employing a vacuum sucker (not shown) on top of the rollers and mechanically coupled thereto.

The disclosed phototherapy apparatus can be used on animal subjects as well. For these veterinarian applications, a comb or comb-like component (not shown) can be integrated in front of the massage/phototherapy component to part the hair of the animal before massage/phototherapy treatment of the skin underneath is performed.

In the foregoing specification, specific embodiments of the present invention have been described. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. For example, the therapeutic light source and the massage component are not limited to the presently disclosed forms. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of present invention. The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims. The invention is defined solely by the appended claims including any amendments made during the pendency of this application and all equivalents of those claims as issued. 

What is claimed is:
 1. A phototherapy apparatus for treatment of a biological tissue, the phototherapy apparatus comprising: a hand piece; a light source coupled to the hand piece, the light source configured to emit light; a ball rotatably coupled to the hand piece and configured to transmit the light; an optical fiber positioned to receive the light emitted from the light source and configured to carry the light; a light guide positioned to receive the light carried by the optical fiber and to transmit the light; and a layer of diffusive optical material positioned to receive the light transmitted by the light guide, wherein the light transmitted by the light guide is transmitted through the layer of diffusive optical material and onto the outer surface of the ball.
 2. The phototherapy apparatus of claim 1, wherein the layer of diffusive optical material is configured to increase a spread angle of the light transmitted from the ball.
 3. The phototherapy apparatus of claim 1, wherein the light source comprises a laser.
 4. The phototherapy apparatus of claim 1, wherein the light source comprises a light emitting diode.
 5. The phototherapy apparatus of claim 1, further comprising a tube coupled to the hand piece and configured for delivering a fluid substance from one or more locations adjacent to the ball.
 6. The phototherapy apparatus of claim 1, further comprising a touch sensor coupled to the handle and configured to detect contact between the ball and a skin tissue.
 7. The phototherapy apparatus of claim 6, wherein the touch sensor is configured to turn on the light source based on detecting contact between the ball and the skin tissue.
 8. The phototherapy apparatus of claim 1, further comprising a motor coupled to the hand piece and configured to generate a vibrational movement of the ball.
 9. The phototherapy apparatus of claim 1, wherein the apparatus is arranged to deliver the light at desired dose parameters to the tissue.
 10. The phototherapy apparatus of claim 9, wherein the desired dose parameters include one or more of desired light direction, angle, power density, depth, and intensity distribution.
 11. A method comprising: applying a phototherapy apparatus to a tissue surface, wherein the phototherapy apparatus comprises: a hand piece; a light source coupled to the hand piece, the light source configured to emit light; a ball rotatably coupled to the hand piece and configured to transmit the light; an optical fiber positioned to receive the light emitted from the light source and configured to carry the light; a light guide positioned to receive the light carried by the optical fiber and to transmit the light; and a layer of diffusive optical material positioned to receive the light transmitted by the light guide, wherein the light transmitted by the light guide is transmitted through the layer of diffusive optical material and onto the outer surface of the ball, wherein the applying the phototherapy apparatus to the tissue surface delivers therapeutic light and mechanical massage to the tissue surface in a concerted manner.
 12. The method of claim 11, wherein the phototherapy apparatus further comprises a touch sensor coupled to the handle that is configured to detect contact between the ball and the tissue surface.
 13. The method of claim 12, wherein the therapeutic light is delivered at least in part in response to the touch sensor detecting contact between the ball and the tissue surface.
 14. The method of claim 11, wherein the phototherapy apparatus is configured for delivering a fluid substance from one or more locations adjacent to the ball.
 15. The method of claim 14, further comprising delivering, from the one or more locations adjacent to the ball, warmed air to the tissue surface.
 16. The method of claim 14, further comprising delivering, from the one or more locations adjacent to the ball, massage oil to the tissue surface.
 17. The method of claim 11, wherein the phototherapy apparatus further comprises a motor coupled to the hand piece and configured to generate a vibration movement of the ball.
 18. The method of claim 17, further comprising activating the motor, and wherein the applying the phototherapy apparatus to the tissue surface delivers vibratory movements from the ball to the tissue surface.
 19. The method of claim 11, wherein the applying the phototherapy apparatus to the tissue surface delivers the light at desired dose parameters to the tissue.
 20. The method of claim 19, wherein the desired dose parameters include one or more of desired light direction, angle, power density, depth, and intensity distribution. 